1- Cyclohexyl-3- tetrafluoroborate

The Ar-H functionalization approach has also been used in the preparation of polymers. For instance, a diketopyrrolopyrrole-based polymer was prepared via a palladium-catalyzed direct C-H (hetero)arylation reaction between a di(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-l,4-dione and 4,7-dibromo-2,l,3-benzothiadiazole (eq31). The reaction was conducted using palladium acetate as the catalyst and pivalic acid as an additive. A survey of different phosphines demonstrated that molecular weights of the same order and similar polydispersity indexes (PDI) were obtained using tri-terf-butylphosphonium and tri-ferf-cyclohexyl tetrafluoroborate. ... 

Whereas nitrosative decomposition of azidoalkanes such as hexyl, cyclohexyl, and benzyl azides with nitrosomum tetrafluoroborate gives only 0-5% yields of... 

Solubility sol dichloromethane, 1,2-dichloroethane, and diethylene glycol dimethyl ether insol diethyl ether and pentane. Preparative Methods the complex is prepared in situ by the reaction of bis(cyclohexyl isocyanide)gold(I) tetrafluoroborate with (R)-N-[2-(N,N-Dimethylamino)ethyl]-N-methyl-l-[(S)-I, 2-bis (diphenylphosphino)ferrocenylJethylamine, typically in dichloromethane. ... 

The gold(I) complex is prepared in situ by the reaction of (1) with bis(cyclohexyl isocyanide)gold(I) tetrafluoroborate (2), typically in anhydrous dichloromethane. The dihydrooxazolines obtained provide a ready access to enantiomerically pure p-hydroxy-a-amino acid derivatives. High diastereo- and enantios-electivity are generally maintained with a wide variety of substituted aldehydes, and a-isocyanoacetate esters. N,N-Dimethyl-a-isocyanoacetamides and a-keto esters have been substituted for the a-isocyanoacetate ester and aldehyde component, respectively, sometimes with improved stereoselectivity. The effect of both the central and planar chirality of (1) on the diastereo- and enantioselectivity of the gold(I)-catalyzed aldol reaction has been studied. The modification of the terminal di-alkylamino group of (1) can lead to improvements in the stereos-... 

Bis(cyclohexyl isocyanide)gold(I) Tetrafluoroborate-(/J)-A/-[2-(A/, N-Dimethylamino)ethyl]-N-methyl- 1-(S)-1, 2-bis(diphenylphosphino)ferrocenyl]ethylamine, 115 C41H50O4... 

Selective hydrolysis of an amide. The analogous reagent a-chloro-N-cyclohexyl-acetaldonitrone was used in a total synthesis of vitamin B125 to effect selective hydrolysis of an amide function in the presence of six methyl ester groups. Thus treatment of the a-chloronitrone with silver tetrafluoroborate generates the electrophilic cation (1). This... 

A notable recent innovation is the coupling of dimethyl acetylenedicarboxylate (DMAD), cyclohexyl isocyanide and an aromatic aldehyde in benzene under reflux giving the 2-aminofurans 70 in good yield (60 70%) (Eq. (9)) (00CC1019, 03ACR899). The method can be carried out at room temperature in higher yield in an ionic liquid (l-butyl-3-methylimidazolium tetrafluoroborate) from which the product is easily isolated by extraction with ether (04S2376). 

Gold(I) complexes prepared in situ from bis(cyclohexyl isocyanide)gold(I) tetrafluoroborate (1) [3] and chiral ferrocenylphosphine ligands (i )-(S)-2a-e [4,... 

Another route to this cyclohexyl derivative involves the preparation of 6.183 via an olefmation reaction with a substituted phenylalinal derivative followed by reduction of the phenyl ring. The alcohol moiety in 6.183 was converted to the N-phthal-oyl derivative (6.184) by a Mitsunobu inversion.m Conjugate addition with a higher order silyl cuprate gave 6.185. The silyl moiety was converted to an alcohol (6.186) by treatment with tetrafluoroboric acid and then KF/m-chloroperoxy-benzoic acid. Removal of the phthalimidoyl group with hydrazine led to an amino-ester, which cyclized to lactam 5.757.11 Hydrolysis gave 4-amino-5-cyclohexyl-3-hydroxypentanoic acid (6.188) in 60% yield. 

C2 5H2 sFeNOa, (2-Cyclohexyl-3,5-diphenyl-1-oxo-2-azapenta-(3-5-tj)-enyl-1-yl)tricarbonyliron, 44B, 1131 C2 5H2 ftBFijMnNOaPS, (Dimethylamino(thiomethoxy )carbene) (triphenylphos-phine)tricarbonyImanganese tetrafluoroborate, 42B, 630 C2 5H2 i Cl2N2Pt 0.5 C2H6O, Dichlorobis( 1, 2-diphenylcyclopropane)bis-(pyridine)platinum ethanolate, 39B, 571 C2 5H2 l Fes 20 6 f Tetramethylammonium carbidohexadecacarbonyl-hexaferrate(2-), 40B, 715... 

Also obtained by treahnent of 2,4,6-trihydroxy-benzophenone with prenyl di-n-cyclohexyl-sulfonium tetrafluoroborate salt (1 equiv) in the presence of Hiinig s base (1.1 equiv) in methylene chloride at r.t. for 7 h (10%) [1536]. 

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